From ed04d0b6be8666b661712746ee604defd714bae6 Mon Sep 17 00:00:00 2001
From: Scott Lahteine <github@thinkyhead.com>
Date: Thu, 22 Jun 2017 08:57:53 -0500
Subject: [PATCH] Label DualXMode enums

---
 Marlin/enum.h | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Marlin/enum.h b/Marlin/enum.h
index 764e154cd0..34c5bb68af 100644
--- a/Marlin/enum.h
+++ b/Marlin/enum.h
@@ -167,10 +167,13 @@ enum LCDViewAction {
   LCDVIEW_CALL_NO_REDRAW
 };
 
+/**
+ * Dual X Carriage modes. A Dual Nozzle can also do duplication.
+ */
 #if ENABLED(DUAL_X_CARRIAGE) || ENABLED(DUAL_NOZZLE_DUPLICATION_MODE)
   enum DualXMode {
-    DXC_FULL_CONTROL_MODE,
-    DXC_AUTO_PARK_MODE,
+    DXC_FULL_CONTROL_MODE,  // DUAL_X_CARRIAGE only
+    DXC_AUTO_PARK_MODE,     // DUAL_X_CARRIAGE only
     DXC_DUPLICATION_MODE
   };
 #endif